1 month post lower blepharoplasty revision my left eyelid looks worse than before. How soon before I can get another revision?

You are still just 4 weeks post-op. My advice at this point would be to wait at least 6 months before considering any kind of revision. It takes several weeks to months for all of the swelling to resolve and the tissues to settle.
If you jump into revisions earlier, then you may actually make everything worse. Also, you may be surprised how tissues even out over this amount of time. If, at that time, your surgeon says there is nothing that can be done, then you may want to check around or get recommendations another local surgeon for additional advice.
Good luck with your recovery.

Puffiness and revision after eyelid surgeryRevision Surgery

Revision eyelid surgery should be done at least 6 months
after the initial surgery to allow time for healing and tissues to soften. Asymmetries, excess skin, fat rolls, fat malposition can all be improved. Other treatments may include laser or
chemical peels to tighten skin and improve texture

Because
skin around the eye area is delicate and thin, a blepharoplasty is considered a
complex procedure and requires significant skill. If a significant amount of
fat was removed, the swelling may persist for a longer period of time. However,
it is difficult to determine the precise cause of the prolonged swelling
without a physical examination. The eye area needs at least six months to heal
after the procedure, and swelling care rarely persist for this length of time
around the lower eyelid, so a revision should not be considered prior that
milestone.

One should wait at least three to four months after a blepharoplasty procedure to undergo a revision lower blepharoplasty procedure. Most oculoplastic surgeons understand the anatomy of the lower lids quite well. A facial plastic surgeon who has extensive experience in eyelids can also assist you with a revision.

Of course, swelling plays a role in any surgery, but sometimes it is the expectations after surgery that have to be adjusted. The anatomical variants of the lower eyelid make it difficult to make every eyelid look smooth and perfect.
Without an exam, I certainly cannot judge. However, keep this in mind when you seek out your second opinion.